fileinfo.cpp

Trolltech公司发布的图形界面操作系统。可在qt-embedded-2.3.10平台上编译为嵌入式图形界面操作系统。

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#include <qlabel.h>
#include <qheader.h>
#include <qlayout.h>
#include <qlistview.h>
#include <qhbox.h>
#include <qvbox.h>
#include <qfileinfo.h>
#include <qvgroupbox.h>
#include <qtabwidget.h>
#include <qlineedit.h>
#include <qspinbox.h>
#include <qgrid.h>
#include "fileinfo.h"

#include <qtopia/mediaplayerplugininterface.h>
#include "mediaplayerstate.h"
#include "id3tag.h"

#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#include <qtopia/docproperties.h>
#include <qtopia/vscrollview.h>


/*!
  \class MediaFileInfoWidget fileinfo.h
  \brief This class is specific to the mediaplayer apps.

    It is currently private to those apps, and its API,
    and therefore binary compatibilty may change in later
    versions.

    It displays a property box specific for media files.
*/


class GeneralInfoView;


class ID3TagEditWidget : public QWidget {
    Q_OBJECT
public:
    ID3TagEditWidget( QWidget *parent, const DocLnk& lnk );
    void writeTagData();
private:
    bool tagDataChanged();
    void readInputFields();
    const DocLnk& fileInfo;
    ID3Tag inputTag;
    ID3Tag outputTag;
    QLineEdit *id3Title;
    QLineEdit *id3Artist;
    QSpinBox *id3Year;
    QLineEdit *id3Album;
    QSpinBox *id3Track;
    QLineEdit *id3Comment;
};


ID3TagEditWidget::ID3TagEditWidget( QWidget *parent, const DocLnk& lnk ) : QWidget( parent ), fileInfo( lnk )
{
    QGridLayout *gl = new QGridLayout( this, 5, 4, 6, 2 );
    
    gl->addWidget( new QLabel( tr("Title"), this ),   0, 0 );
    gl->addWidget( new QLabel( tr("Artist"), this ),  1, 0 );
    gl->addWidget( new QLabel( tr("Album"), this ),   2, 0 );
    gl->addWidget( new QLabel( tr("Year"), this ),    3, 0 ); 
    gl->addWidget( new QLabel( tr("Track"), this ),   3, 2 );
    gl->addWidget( new QLabel( tr("Misc"), this ),    4, 0 );

    int fd = ::open( fileInfo.file().local8Bit().data(), O_RDONLY );
    inputTag.read( fd );
    ::close( fd );

    gl->addMultiCellWidget( id3Title = new QLineEdit( inputTag.title(), this ), 0, 0, 1, 3 );
    gl->addMultiCellWidget( id3Artist = new QLineEdit( inputTag.artist(), this ), 1, 1, 1, 3 ); 
    gl->addMultiCellWidget( id3Album = new QLineEdit( inputTag.album(), this ),   2, 2, 1, 3 );
    gl->addWidget( id3Year = new QSpinBox( 0, 9999, 1, this ), 3, 1 );
    gl->addWidget( id3Track = new QSpinBox( 0, 255, 1, this ), 3, 3 );
    gl->addMultiCellWidget( id3Comment = new QLineEdit( inputTag.comment(), this ), 4, 4, 1, 3 );

    id3Year->setValue( inputTag.year() );
    id3Track->setValue( inputTag.track() );

    gl->setRowStretch(5,1);
}


void ID3TagEditWidget::readInputFields()
{
    // To my knowledge, ID3 tags are assumed to be latin1
    outputTag.setTitle( id3Title->text().latin1() );
    outputTag.setArtist( id3Artist->text().latin1() );
    outputTag.setYear( id3Year->value() );
    outputTag.setAlbum( id3Album->text().latin1() );
    outputTag.setTrack( id3Track->value() );
    outputTag.setComment( id3Comment->text().latin1() );
}


bool ID3TagEditWidget::tagDataChanged()
{
    readInputFields();
    if ( inputTag.title() != outputTag.title() || inputTag.artist()  != outputTag.artist() ||
	 inputTag.year()  != outputTag.year()  || inputTag.album()   != outputTag.album() ||
	 inputTag.track() != outputTag.track() || inputTag.comment() != outputTag.comment() )
	return TRUE;
    return FALSE;
}


void ID3TagEditWidget::writeTagData()
{
    if ( tagDataChanged() ) {
	int fd = ::open( fileInfo.file().latin1(), O_RDWR );
	outputTag.write( fd );
	::close( fd );
    }
}


class MediaFileInfoWidgetPrivate {
public:
    GeneralInfoView *prop; 
    ID3TagEditWidget *tagEdit;
    DocLnk docLnk;
};


class DetailedInfoView : public VScrollView {
    Q_OBJECT
public:
    DetailedInfoView( QWidget *parent, const DocLnk& fileInfo ) : VScrollView( parent ) {
	grid = new QGrid( 2, widget() );
	grid->setMargin( 3 );
	QFileInfo fi( fileInfo.file() );
	addEntryPair( tr("File"), fi.fileName() );
	addEntryPair( tr("Path"), fi.dirPath( true ) );
	addEntryPair( tr("Size"), QString::number( fi.size() ) + " " + tr("bytes") );
	addEntryPair( tr("Type"), fileInfo.type() );
	addEntryPair( tr("Date"), fi.lastModified().date().toString() );
	if ( mediaPlayerState->decoder( fileInfo.file() ) ) {
	    mediaPlayerState->decoder()->open( fileInfo.file() );
	    QStringList fileInfo = QStringList::split( ',', mediaPlayerState->decoder()->fileInfo() );
	    mediaPlayerState->decoder()->close();
	    QStringList::Iterator it;
	    for( it = fileInfo.begin(); it != fileInfo.end(); ++it ) {
		QString entry = (*it);
		QStringList entryPair = QStringList::split( ": ", entry );
		addEntryPair( entryPair[0]+" ", entryPair[1] );
	    }
	}
	QVBoxLayout *l = new QVBoxLayout( widget() );
	l->setMargin( 3 );
	l->addWidget( grid );
    }
    void addEntryPair(QString lab, QString val) {
	new QLabel( lab, grid );
	(new QLineEdit( val, grid ))->setReadOnly(TRUE);
    }

    QGrid *grid;
};


class GeneralInfoView : public VScrollView {
    Q_OBJECT
public:
    GeneralInfoView( QWidget *parent, DocLnk *fileInfo ) : VScrollView( parent ) {
	QVBox *vbox = new QVBox(widget());
	QHBox *title = new QHBox( vbox );
	title->setMargin( 3 );
	QLabel *icon = new QLabel( title );
	QLabel *filename = new QLabel( title );
	filename->setText( fileInfo->name() );
	icon->setPixmap( fileInfo->bigPixmap() );
	prop = new DocPropertiesWidget( fileInfo, vbox );
	QVBoxLayout *l = new QVBoxLayout( widget() );
	l->setMargin( 3 );
	l->addWidget( vbox );
    }
    void applyChanges() {
	prop->applyChanges();
    }
    DocPropertiesWidget *prop;
};

MediaFileInfoWidget::MediaFileInfoWidget( const DocLnk& fileInfo, QWidget *parent, const char *name )
    : QDialog( parent, name, TRUE )
{
    d = new MediaFileInfoWidgetPrivate;
    d->docLnk = DocLnk( fileInfo );

    setCaption( tr("File Information") );

    QTabWidget *tw = new QTabWidget( this );

    tw->addTab( d->prop = new GeneralInfoView( tw, &d->docLnk ), tr("General") );
    connect( d->prop->prop, SIGNAL( done() ), this, SLOT( reject() ) );

    QFileInfo fi( fileInfo.file() );
    if ( fi.extension( FALSE ).upper() == "MP3" ) 
	tw->addTab( d->tagEdit = new ID3TagEditWidget( tw, fileInfo), tr("ID3 Tags") );

    tw->addTab( new DetailedInfoView( tw, fileInfo ), tr("Details") );

    QVBoxLayout *l = new QVBoxLayout( this ); // Give it a layout
    l->addWidget( tw );
}


MediaFileInfoWidget::~MediaFileInfoWidget()
{
    delete d;
}


void MediaFileInfoWidget::accept()
{
    d->prop->applyChanges();
    
    QFileInfo fi( d->docLnk.file() );
    if ( fi.extension( FALSE ).upper() == "MP3" ) 
	d->tagEdit->writeTagData();

    QDialog::accept();    
}

#include "fileinfo.moc"